<template>
    <div class="cmt-container">
        <h3>发表评论</h3>
        <hr>
        <textarea placeholder="评论内容不要超过20字" maxlength="120" v-model="msg"></textarea>
        <mt-button type="primary" size="large" @click="postComment">发表评论</mt-button>
        <div class="cmt-list">
            <div class="cmt-item" v-for="(item,i) in comments" :key="item.add_time">
                <div class="cmt-title">
                    第{{i+1}}楼&nbsp;&nbsp;用户：{{item.user_name}}&nbsp;&nbsp;发表时间：{{item.add_time|dateFormat}}
                </div>
                <div class="cmt-body">
                    {{item.content ==='undefined'?'此用户很懒什么也没留下':item.content}}
                </div>
            </div>
        </div>
        <mt-button type="danger" size="large" plain @click="getMore">加载更多</mt-button>
    </div>
       
</template> 

<script>
import {Toast} from "mint-ui"
export default {
    data(){
        return {
        pageIndex:1 ,//默认展示第一页
        comments:[],
        msg:""
        };
    },
    created(){
     this.getComments();
    },
    methods:{
        getComments(){  //加载评论
            this.$http.get("api/getcomments/"+this.id+"?pageindex="+this.pageIndex).then(result =>{
                if(result.body.status ===0){
                   // this.comments= result.body.message;
                   //老数据加新数据
                   this.comments = this.comments.concat(result.body.message);

                }else{
                    Toast('获取评论失败！')
                }
            })
        },
        getMore(){  //加载更多
            this.pageIndex++;
            this.getComments();

        },
        postComment(){
            if(this.msg.trim().length === 0)
            {
                return Toast('评论内容不能为空！');
            }

            this.$http.post('api/postcomment/'+this.$route.params.id,{content:this.msg.trim()}).then(function(result){
                if(result.body.status ===0){
                   var cmt={
                       user_name:"匿名用户",
                       add_time:Date.now(),
                       content:this.msg.trim()
                   };
                   this.comments.unshift(cmt);
                   this.msg="";
                }
            })
        }
    },
    props:["id"]
    
}
</script>

<style lang="scss" scoped>
.cmt-container{
    h3{
        font-size: 18px;
    }
    textatea{
        font-size: 14px;
        height: 85px;
        margin: 0;
    }
    .cmt-list{
        margin: 10px 0;
        .cmt-item{
            font-size: 13px;
            .cmt-title{
                line-height: 30px;
                background-color: #ccc;
            }
            .cmt-body{
                line-height: 35px;
                text-indent: 2em;
            }

        }
    }
}

</style>


